Time announcing system



July 15, 1952 E. s. PETERSON TIME ANNOUNCING SYSTEM Original Filed Jan. 28, 1949 4 Sheets-Sheet 2 O ,w\ EN o 8N ma EN QON MON N3 o o 8N o o a n@ @QN EN July 15, 1952 E. s. PETERSON Re. 23,522

TIME ANNouNcING SYSTEM Original Filed Jan. 28, 1949 4 Sheds-Sheet 5 FIG.4

FIGB

IN VEN TOR. EDWARD S. PETERSON ATTY.

July 15, 1952 l E. s. PETERSON Re. 23 ,522

TIME ANNOUNCING SYSTEM OPERATING TIME 0F CAMS II3,II4 AND IIS 0N THE MASTER TIMER DURING EVERY FIFTEEN SECOND PERIOD TIME IN SEOONDS umm cm n3 om us FIG] 102 To RELAY (alo 296 2m FIGB INI/Ewan.

sowing' s. Branson ATTY.

Reissued July 15, 1952 TIME ANNOUNCING SYSTEM Edward S. Peterson, Elmwood Park, Ill., assignor to Automatic Electric Laboratories', Inc., Chicago, Ill., a corporation of Delaware original No. 2,530,076, dated November 14, 1950, Serial No. 73,303, Januaryy 28, 1949. Application for reissue 253,324

This invention relates in general to sound reproducing systems and more particularly to a sound reproducing system that'may be utilized -for making periodic announcements at predetermined times such as in time of day announcement service for telephone subscribers and spot announcements for radio broadcasting stations.

The object of this invention is to provide a sound reproducing system whichwill accurately and reliably reproduce a large number of separate individual announcements automatically at predeterminedv times and over a long period of time from a record device having a relatively short running period.

Another object of the invention is to provide a means and method for driving the record device whereby the Wear and tear on the record device is reduced to a minimum compared to that of similar systems and by so doing also allow for a greater number of announcements to be recorded on the record device than may be normallyl recorded on a record device of the same size and length in similar systems.

Another object of the invention is to provide a means and method of synchronizing the time period and the beginning of each announcement so that no accumulation of error may occur over the long period of time needed to make all the announcements, due to any variation that may occur in the driving speed of the system.

One feature of this invention resides in the provision of a record device whereon are recorded a plurality of separate announcements, a driving means for moving the record relative to a reproducer for the purpose of audibly reproducing the announcements, a timer device for automatically starting the driving means at predeter- Claims. (Cl. 179-1003) mined times, and means operated under control .f

of the record device after an announcement has been made for stopping the driving means Another feature resides inthe provision of a plurality of record devices such as magnetic wire, each carrying a sound track thereon, or a single record device such as a strip of lm with a magnetic coating Whereon are recorded a plurality of parallel sound tracks, a common driving means to drive the plurality of record devices in the first instance simultaneously or a driving means for'driving the single record device in the second 4October '26, 1951, Serial No.

instance, a timer device such asa synchronousV motor similar to those used in the common elec'- trical clock, means which will operate under the control ofjthe synchronous motor at predetermined times in the day to start the driving means so that an announcement may be made from-one of the sound tracks. and a control means operated under control of a sound recorded on an.- other of the sound tracks for stopping the driving means after the announcement Y has-been made. j p Another feature resides in the'provision of a nlm record device whereon the announcement sound tracks are parallel and run longitudinally in alternately opposite directions, a reversible driving means for driving the lm in alternately opposite directions past the reproducer means to reproduce the sound on the 'sound tracks, and a timer device for causing the driving means to be reversed and the reproducer means tobe associated with the proper sound track at the proper time thereby allowing a relatively short length of lm to be used to make a large number of announcements without interrupting the continuous chain of announcements to change reels or rewind the film. Another feature resides in the method used to drive thellm consisting of'a friction roller instead of a sprocket wheel so as to minimizek Wear and tear on the film and as a result eliminating the sprocket holes on the lm thereby allowing room for additional sound tracks on the film.

These and other objects, features, uses and advantages of the invention can be easily perceived by those skilled in the art'from the following detailed description. l The drawings and the following description show one means of carrying o-ut this invention but it is tobe understood ythat the same result may-be obtained in other ways apparent to those skilled in the art. The machine and method disclosed herein constitute a time announcement system comprising a lm with a coating of magnetic substance Whereon are magnetically recorded a plurality of parallel sound tracks; One of the sound tracks is used as a control sound track. The remainder of the sound tracks are announcement sound tracks containing Aagreat number of separate time of the day announcements. The announcement sound tracks run in alternately opposite directions and for the entire length of the film. A magnetic reproducer head and amplifying means is used to reproduce the time announcements on the announcement sound tracks, a motor driving means being used to drive the lm past the reproducer. A second reproducer means is used to reproduce the sound recorded on the control sound track. A synchronous motor of the type used in an electrical clock is used to control the exact time the announcements are made. At the time of the day corresponding to the first time announcement recorded on the announcement sound track, the timer automatically causes the driving motor to be energized and the film to move past the two reproducing heads. The first time on the sound track is then announced. Immediately after the announcement, a control signal recorded on the control sound track so as to be reproduced after the v announcement causes the drivingmotor to be deenergized and the film to stop. After a short interval of time. the timer at the next time period energizes the motor. The second announcement is made and the control sound track then causes the driving motor to be deenergized. This continues until the last announcement recorded on the'one sound track is made at which time the timer causes the announcement reproducer head to move transversely to the lm and become associated with a second announcement sound track on which are recorded the subsequent time announcements directly following those recorded on the said one announcement sound track'. The timer device also causes the driving motor leads to be reversed so that the film will run in the opposite direction to that followed during the time the announcements on the Said one sound track were being made. The separate announcements on the second announcement sound track are made in the same manner as `those on the first sound track, the` timer device automatically starting the driving motor at the correct time and the control sound track causing the driving motor-to stop when the announcement has been made. The same control sound track is used in conjunctiony with all the announcement sound tracks since each announcement is recorded on a segment of the lm equal in length to the segments of the film used to record all, the other announcements. This is described in detail at a later point in the specification.

The machine will continue to operate, the driving direction of thev film being reversed at the end of each announcement sound track and the announcement reproducer head being associated with the proper announcement sound track at such timey'until the last, announcement in the last sound track has been made atwhich time the machine will commence the same cycle and repeat the operations described above until the machine is normally deenergized. The, exact method of carrying out the above described` operation vcan be seen from the drawings and description.

Figs. l and 2 constitute a wiring diagram show.- ing the interrelationshipY of the varous units employed in carrying out the principle of this invention.

Fig. 3 is a plan view of the apparatus used` in associatingv the reproducing means with the PQPe? 52ml@- tlak 0n 1511.9' mm Figs. 4 and 10` are side view-s of a part; of apparatus 3 taken from the right.

Fig. 5A is a top view of asection of the used in the, embodiment of the invention.

Fig. 6 is a chart showing the exact operation the time of certain cam springs of the timer device relative to a fifteen second period.

Figs. '1, 8 and 9 show one method of deenergizing the driving motor after announcements.

The record device employed in this embodiment of the invention is a film 2 I 0 similar in shape and dimensions to that used for motion pictures such as 16 mm., 32 mm. or the like. The fllm is specially treated by coating it with a substance that may be easily magnetized such as iron oxide. Located on the film 2|0 are a plurality of parallel spaced sound tracks 50| to I501 inclusive (Fig. 5). Six of these sound tracks 50| to 506 inclusive are announcement sound tracks and the remaining sound track 501 is a control sound track. There could` be more or less than six announcement tracks as there is no limit to the width of lm that could be employed in this embodiment but for our purposes only six announcement sound tracks are 502 inA the direction of thev arrow needed.

Magnetically recorded in each announcement sound track are a plurality of separate announcements as indicated by l508 and`509. The announcements recorded in sound track 50| run in the direction indicated by the arrow 5|2. The announcements recorded in the adjacent sound track 502 run in the opposite direction as indicated by the arrow, 5|3. The announcement sound ltracks run in alternately opposite directions as shown by the arrows for the entire length rof the film. Magnetically recorded in the control sound trackare a plurality of spaced tone signals as shown by 5|0V and 5| The control signals are recorded on the lm so that they immediately follow an announcement. For example control signal 5|0 immediately follows announcement. 508 in announcement sound track 50| and also followsl announcement 5|5 in announcement sound track 502. Iny theembodiment of the invention herein explained, a reproducing means is used to pick up the announcements` such as 508 and 509 and a secondreproducing means is used to pick up the tone signals 5|0 and 5H. It is necessary to pick up the control signal immediately after an announcement has been made and for this reason the control signals have been pictured in Fig. 5 as being recorded on the film so that the two reproduce'rs sweepingk along the film longitudinally vin the same plane perpendicular to the film and in either direction would encounter a control signal irnmediately after anannouncement` has been reproduced. This can be seen be imagining that a reproducer were moving along sound track 50| in the direction of the arrow 5|2 and a second reproducer were moving along sound track 501 in the same direction and in the same transverse plane as the first reproducer. Immediately after announcement 508` had been reproduced by the iirst reproducer, the second reproducer lwould encounter the control signal 5| 0.` Also, if the first reproducer were moving along sound track 5| 3 andthe second; reproducen moving along -sound track 501 1n the same direction and in the samer transverse plane as the first reproducer, immediately after the first reproducer had preproduced the announcement 515 thegsecond reproducer-.would encounter control'signalil 0. Motion is only rel-l ative and it makes no difference if the-reproducers move over thefilmor the film moves past; the reproducers.` The method employed in this machlne is tormove the lm vpast .the reproducers. It must be understoodA thatjthe control signals are recorded on the film so that they will be lpicked up by the second reproducer immediately after an announcement and if the reproducers are not inthe same plane perpendicular to an imaginary longitudinal line on the film as was assumed in drawing and describing Fig. 5, the control signals must be off-set relative to the announcements to compensate for the distance between the reproducers. It should also be understood that the entire portion of sound track allotted for each announcement such as 508 need not be completely utilized as is illustrated by announcement 5|6 Aand the preceding cross hatched area representing the segment of the allotted sound track not neededfor making the announcement.

The iilm driving means and take-up reels are shown in Fig. 2. The film ,2| is carried by two iilm reels 200 and 20|. rlhe film take-up mechanism used to drive reels 20|)l and 20| is similar to that employed in other systems involving the feeding of film and, not being material vto the invention` herein, will not be explained in detail. It willsuifice to say that the film will 'be taken up'by one reel and taken off the other depending on which direction the film vdriving motor 2 l2 is rotating. The film is driven 4by capstan 209, which in turn is directly driven by motor-2|2. The capstan is a drum shaped roller the driving surface of which is composed of rubber or leather or other frictional material. The film is passed around capstan 209 and is pressed tightly against the capstan by rollers 206 and 201 which are pivoted at points 2|3 and tensioned against the capstan by spring 208. The film 2|0 also vpasses around idler rollers 202 and 203 and over rollers 204 and 205. Rollers 204 and 205 act asa support for the section of film between the rollers 204 and 205 upon which the magnetic reproducer head 2|| rests. The magnetic reproducer head 2|| is associated with the control sound track 501 of the film 2|0. A second magnetic reproducer Ahead 240 presses against the film as it passes over capstan 209, this head being the reproducer associated with the announcement sound tracks 50| to "506 inclusive. Th'emethod for aligning .the head 240 with any one announce-'-l ment sound track is subsequently explained. vThe capstan 209 is driven by reversible motor 2 |`2,A the direction of driving capstan 209 and thereby film 2|0 dependent on the way leads 263 to 266 inclusive are connected to the 60 cycle power source 285.

The heart of this machine is the master timer device comprising a synchronous motor |00 similar to those used in electrical clocks and a plurality of cams |05 to ||5 inclusive driven by the motor |00 at various rotational speeds in the same manner as the hands of a clock. The synchronous motor |00 is connected directly to the 60 cycle commercial po-wer line 285 so as to be continually running since it functions as a timepiece. The motor |00 drives the four shafts |0| to |04 inclusive, shaft |0| rotating at a speed of one revolution every twelve hours, shaft |02 rotating once every hour, shaft |03 rotating once every minute, and shaft |04 making one revolu- .tion every seconds. The two hourf cams |05 to ||0 inclusive Iare iixedly mounted on shaft |0| and make one revolution every twelve hours; the "hour cam is mounted on shaft |02 and makes one revolution per hour; the minute `cam |2 is mounted on shaft |03 and makes one revolution per minute; and the fifteen second cams ||3 to ||5 inclusive are mounted on;shaft |04 and make one revolution every fifteen seconds. Associated with each cam |05 to. ||5 inclusive are cam springs ||'6 to |216 inclusive, the cam springs being caused to operate and restore under the control of notches in the periphery of the cams. The two hour cams are so positioned on the shaft |0| `that the notches'are equally spaced angularly relative to the4 center line of the shaft |0|. This can be seen from an examination of Fig. l. Since each two hour cam rotatesonce every twelve hours, each cam spring ||E to |2| .inclusive will operate and restore once every twelve. hours, cam springs ||B to |2| inclusive operating successively at two hour periods. The drawing has been arranged to show that cam ||0 will operate cam springs I2| at some period shortly before 12 oclock, cam |09 will operate cam springs |20 at some period shortly before two oclock, -cam |08 will operate camsprings I|9 at some period shortly before four oclock, etc. The fone hour cam is so positioned that the notch operates the cam springs |22 every hour on the hour or Shortly before the hour. The minute cam ||2 is positioned to operate cam springs |23 once every minute exactly on the minute. The fifteen second cam I3 is arranged to operate cam springs |24 on the sixth second of every fifteen second period and the notch in cam ||3 is made so that cam springs |24 will be closed for approximately three and one half seconds. Fifteen second" cam ||4 is arranged so that the notch operates cam springs |25 once every fifteen seconds exactly on the fifteenth second. Fifteen second cam ||5 is `arranged to close cam springs |26 during the period from about the first half second to the fifth and one half second and again from about the sixth and one half second to the thirteenth and one half second of every fifteen second period. A fifteen second time table has been drawn. see Fig. 6, to aid in fixing the sequence of operation for some of the cam springs of the timer device. The reason for the fixed sequence of operation will become apparent as the functions of the machine are later discussed.

One of the features of this machine is the use of a plurality of parallel spaced sound tracks or channels on the recording film which run alternately in opposite direction in a longitudinal direction on the film. The film is run in onedirection with the reproducer means associated with the proper sound track for two hours and, at the end of every two hours, a selecting means is operated under control of the master clock to move the reproducer in a transverse direction to the film to associate the reproducer means with the correct subsequent announcement channel or sound track. The filmwill then run in the reverse direction to that for the previous two hours until, at the end of the second two hours, the selecting means is again operated to associate the reproducing means with the correct sound track and the film is caused to move in the reverse direction to that of the second two hour period. The selecting means for moving the producer means is shown in detail in Figs. 3, 4 and 10. The selecting device consists of a cam 220 with six pins 22| to 226 inclusive projecting from the periphery thereof. The pins are equally spaced around the periphery of the cam 220 and also staggered in a uniform manner transversely across the periphery surface of the cam 220 in such a manner that an imaginary continuous line drawn through the center of each pin around the periphery of the cam would follow a similar course to thattaken by the thread on a screw.

The cam 220 is ilxedly mounted on the cam shaft 221 so as to rotate with the cam shaft 221 .which is` journalled in supports 300 and 300A. Also lixedly mounted on rthe cam shaft 221 are six' cams 230 to'235 inclusive of equal radius each representing a two hour period in a twelve hour span. A notch is located in each cam and the notches are so placed that they4 are spaced equally in degrees around the cam shaft 221 relative to the center line of the cam shaft, as can be seen from observing Fig'..2. A cam spring 242 to 241 inclusiveis associated withv each cam and` it can be seen that the springs .will be operated successively, one operating every sixth of a revolution offthe cam shaft 221 andeach operating once during a full revolution of the shaft 221.

f Associated with the cam 220 and the pins 22| to 220 inclusive is a cam follower arm 228i which is xedly mounted on the shaft 236. The shaft 230` is in turn slidably mounted in supports 300 and and a spring 302 is placed between the arm`-228 and the support 30| so as to tend to move the arm 228 and the shaft 23B in the direction indicated by arrow 305. An adjustable collar 303 withrubber cushion 304' is attached to the shaft 230 at one end soas to limit the shaftsrnove`- ment in said direction to any predetermined position.l Rotatably mounted on the` other end of th'e shaft 2316 is a disk 231 on which reproducer head 2140 is rotatably attached so as to pivot at point 238.r The eccentric relationship created between shaft 235 and head 240 thus allows the adjusting of the head 240 on the caps-tan209 so that the head 240 may be set tangent to the capstan which is the position which will give the best per- J formance. The head 240 is thus adjusted by rotating disk 231 on the shaft 236 until the proper position is reached and then securing the disk to the shaft.

Assume that the arm 228 is in the position indicated by the dottedV lines 308 withthe stop 303 against the support 30|. As the cam 220 is rotated in the direction indicated bythe arrow 306 the pin 22| contacts the arm 228 near the tip and, as the pin 22| moves along' the curved surface of the arm 228, pushes it in the direction opposite to arrow 305 and against spring 302. 'I'he ann. 228,'shaft 226, and head 240 move as one unit. The arm 228 continues to move until the pin 22| reaches the straight portion of the arm at which time reproducer head 240 is associated with channel If the cam` should cease to rotate at this point, the pin 22| would hold the arm in that one position.y If the cam 220 continues to rotate, pin 222 will contact arm 228 near the tip 301 and, as the pin 22A moves alongfthe vcurved portion of the arm 228, will move the arm stillfurther in the direction opposite to arrow 305 until such time as the pin 222 reaches the straight portion of the arm 228. If `the cam 220-should atl this point cease rotating, the pin would hold the arm 228 in this position. As the cam is thus rotated, each pin 22| to 22B inclusive contacts lthe arm 228and each moves it one step. The arm 2.20`wil1 continue to move in that direction opposite to the direction indicated by arrow 30,5 until' the last pin 2.26 loses contactwitn the arm 228- at which time, the arm and the shaft 236 and hea-d 240Y as a unit, not being held by any pin, will be quickly moved in the direction indicated by arrow 305 due to the force of spring 302 until the collar 303 and cushion 304 contact support 30| at which time the arm will be in the position indicated. by dotted .lines 308. It isthusA seen that theV head 240 is moved transverse to the nlm 2 I 0 in equally spaced steps. When the arm 228 is held by pins 222, 223. 224, 225 or229, the head 240 will be associated with ythe channels 502, 503, 504. 505 or 506 respectively on the film 2|0. The shaft 221 and cam220 are driven by a synchronous motor 24| which will be operated under control of the master clock as will hereinafter be described.

The electrical energy used in driving the various components of'this machine is derived from a commercial 60 cycle power line 285, the D. C. voltage needed to operate the relays being obtained by use of step-down transformer 286 and rectifying means 281 in a well known manner. The synchronous motor |00 used in the timer device is connected directly .to the power line 285 so as to be running continuously whether the machine is in use or not since the timer device serves as a clock mechanism and must run in accordance with the time of day.

Assuming that the machine is to start in oper'- ation at rl2 oclock, either a. m. or p. m. since the time announcements in the a. m. are similar to those in the p. m., and also assuming that the 12 oclock time announcements and the subsequent announcements are recorded on the lm in such a manner that the proper running direction of the film 2|0 to cause reproduction of the announcements is from the upper reel 200 to the lower reel 20|, the drawing has been arranged to depict the condition of the machine at a period shortly before 12 oclock. The 12 oclock two hour cam ||0 has rotated to the position shown to cause the cam springs |2I to be closed by the notch in the cam I |0. The hour" cam I|| has similarly rotated to the'position to cause cam springs |22 to close. The "minute" cam ||2 is shown at a period shortly before the exact hour of l2.

To start the machine in operation, a non-lockingk push button 293 is depressed closing the circuit to the lower winding of relay 290 from the battery 294. Relay 290 operates through its lower winding and closes a holding circuit through its upper winding from ground at contacts 29|.. The circuit remains in this position until the minute cam ||2 closes cam springs |23 exactly at 12 oclock.

The circuit provides a signal alarm to indicate whether there is power available to operate the machine. The direct current potential source 294 is an individual battery and is not supplied by the transformer 286 and rectifier means 281 asis the direct; current potential supplied to the various relays of the circuit. As long as relay 290 is not operated, a circuit is closed through springs 292 o f relay 290 from the battery 294 to the signalmeans 295 and a visual signal is evident at some prominent place near the machine. When the non-locking push button 293 is depressed to start the machine, relay 290 is operated by closing the -battery 294 across the lower winding of relay 290. The circuit to the signal means 295 is opened at springs 292 and the signal is extinguished. If there is power available to transformer 280', relay 290 will lock up through its upper winding from the circuit closed by contacts 29| andV the signal 295 will remain extinguished as long as there is power available. However, if there is no power available relay 290 willnot 'lock up through its upper winding and, when the button 293 has been released and the circuit tof the lower winding of relay 290 thereby opened,- relay 290" will restoreand close the circuit to the signal 295 through springs 292'. The

signal will then indicate that there has been a power failure.

At exactly 12 oclock, the minu cam ||2 closes cam springs |23. The ground from contacts 29| of relay 290 is closed through cam springs |23, |22, and |2| to the upper winding of relay |80. Relay |80 operates, closes a holding circuit through contacts |8| Yto its lower winding from ground at contacts 256 of relay 255, closes a circuit to relay 210 through contacts |83, prepares a circuit to relay 258 through contacts |84 from ground at contacts 29| of relay 290, and closes relay 250 through contacts |82 to cam springs 242 associated with cam 235 on the reproducer head cam shaft 221. Relay 210 operates and prepares a circuit from ground at contacts 29| of relay 290, cam springs |24 on the second pulse cam I|3 to the lower winding of relay 280.

If the reproducer head 240 is not associated with the sound track on the lm 2|0 carrying the 12 oclock announcement, the cam springs 242 will be held closed by the cam 235 and the ground 248 is closed through the cam springs 242 and through springs |82 of relay |80 to relay 250. Relay 250 will operate, closing the circuit, through contacts 25|, from the 60 cycle power source'285 to the motor 24|. The motor 24| is energized and rotates the shaft 221 and' cams l2 30 to 235 inclusive until the notch in cam 235 causes the cam springs 242 to be opened and the ground 248 to be removed from relay 250. Relay 250 releases and opens the circuit, through contacts 25|, to the motor 24|. The motor is deenergized and the shaft 221 and cams 230 to 235 cease to rotate. As the shaft 221 was rotating, the cam 220 was also rotating therewith and the pins 22| to 226 inclusive on the cam 220 were causing the arm 228 and the reproducer head 240 to be moved in a direction transverse to the lm 2|0. The cam 235 is so positioned on the shaft 221 that when it caused the motor 24| to be deenergized, the reproducer head 240 had been moved to the correct sound track, that containing the twelve oclock announcement, on the film 2|0.

Approximately six seconds after cam ||2 and cam springs |23 had caused the operation of relay |80, cam springs |24 are closed by fifteen second cam ||3 closing ground at contacts 29| of relay 290 through contacts 212 of relay 210 to the lower winding of relay 280. Relay 280 operates, closes a circuit from ground at contacts 291 of relay 296 through contacts 28| to its upper winding to hold relay 280 operated when the cam springs |24 operate to open the circuit to the lower Winding, and closes the ground at contacts 29| of relay 290 through contacts 282 and contacts |84 of relay |80 to relay 258. Relay 258 operates and closes the circuit, through contacts 259, from the 60 cycle power source 285 to the film driving motor 2|2. One side of the 60 cycle source is closed to the motor 2|2 through leads 265 and 288 and the other side through leads 263 and 264, such a connection causing the motor 2 2 to be driven in the proper direction to cause the nlm to be taken off reel 200 and taken up by reel the direction being that for reproducing the announcements on the 12 oclock sound track.

As the film 2|0 is being driven past the announcement reproducer head 240 and the control reproducer head 2| the announcement recorded on the sound track associated with the announcement reproducer head is lpicked up by the reproducer head 240, ampliiied through am- 10 plifying means |90 and induced over the line |92 to be heard by subscribers waiting for the time announcement. The announcement may be something like At the next tone signal the time will be twelve oclock and one quarter minute.

Immediately after the end of the announcement. a signal recorded on the control sound track is picked up by the control reproducer; head 2||. If the two reproducer heads were inthe same plane transverse to the film 2|0, the control signal would be recorded on the nlm in the position relative to the announcements as shown in Fig. 5. If the reproducers are not in the same plane transverse to the film, as shown in Fig. 2, the control signal must be off-set relative to the announcement to compensate for the distance between the two heads so that the control signal will be picked up immediately after the announcement has been made.

The control signal picked up by the reproducer head 2|| is amplified by amplifying means 288 and then rectified by rectifying means 289, the direct current output operating relay 296 during the short period the signal is being reproduced. Operation of relay 296 opens contacts 291 thus removing ground 298 from the upper Winding of relay 280. Relay 280 restores and opens the circuit to relay 258 from ground at contacts 29| of relay 290. Relay 258 resto-res and at contacts 259 opens the circuit from the 60 cycle power source 285 to the lm driving motor 2|2. The

motor 2|2 is deenergized and stops, causing the film 2|0 to stop.

Exactly on the fifteenth second after twelve oclock, the fifteen second cam ||4, by means of the notch in its periphery, closesv cam springs |25 causing ground at contacts 29| of relay 290 to be closed to relay 215 and to the oscillator |9|. The ground closed to the oscillator circuit causes it to operate to place a short audible tone on the line |92 as the time tone signal. This tone is placed on the line under control of the timer device and not from the lm 2|0 as is the time announcement and therefore is as accurate relative to time as the timer device.

Approximately six seconds after cam springs |25 have operated to cause the short audible tone to be placed on the line, fifteen seconds after cam springs |24 were rst operated, cam ||3 again closes cam springs |24 to `cause -ground at contacts 29| of relay 290 to be closed through contacts 212 of relay 210 to the lower Winding of relay 280. Relay 280 operates, closes ground 298 from contacts 291 of relay 298 through contacts 28| to its upper winding to hold relay 280 operated when the circuit to the lower Winding is opened by the opening of cam springs |24, and closes ground at contacts 29| of relay 290 through contacts 282 and contacts |84 of relay |80 to relay 258. Relay 258 operates as before, closing the 60 cycle power to the lm driving motor |2| through contacts 259 and over leads 283 to 266 inclusive. The motor is energized and drives the capstan or driving roller 209 and film 2|0 to reproduce the second quarter-of-a-minute time announcement. Immediately after this second announcement has been made, the control pickup 2|| encounters a second control signal which is amplied through amplifying means 288 and rectied through rectifying means 289 and which operates relay 298 as before. Relay 296 opens contacts 291 to remove ground 298 from the circuit through the upper Winding of relay 288. Relay 280 restores and opens` the circuit from ground at contacts 29| of relay 290 to relay 258.

11 Relay 253 restores vtor-open the circuit to the nlm drivingmctor'Z-IZ as before. The iilm `stopsrunj'- ningfwhen the motor 252 `is deenergized.l ,The

tone isagain placed fon. the line yon the thirtieth y 'secondxcfthe minute due to the closing of cam springs |25 by cam Us. 'The cycle is again. repeated,-carn I I3 causing relay 232 'to operate which in turn causes relayV 258 to operate and the fi-lm'driving motor 2|2 to start to cause the next time announcement to bernade. After this announcement is made-'relay 295 again operates in response to a signal-on the control sound track of the nlm tov stop the nlm driving motor.. The ,timer then operates to place a tone on the line exactly on the fteen second of that quarter of a-,lnimute period; Thus it can be seen thata series ofv time announcements can be made followed by a tone signal. Themethod employed here starts the lm driving motor 2 I 2 about the sixth second of every fiteen second period and the announcement and control signal are so recorded on the film 2|8 that the film driving motor 2|2 runs -untilabout the thirteenth or fourteenth second of every ifteen second period and stops., n the fifteenth second the tone signal is produced. This leaves a period of about sii: seconds beforethe next announcement so this time is utilized b-y an advertisement.

The-advertisement machine used to reproduce advertisements to the telephone subscriber betvveenfthel time announcements is constructed similar to and operates inthe same manner as the time announcement mechanism itself. The 4advertisements may be recorded on lm in the same manner as the separate ytime announcements, there being-a plurality of different `advertisements, a plurality of sound tracks,V a reproducer vthat could be shifted from one sound track to another, and a `means fory stopping the running of the Iilm after each advertisement has been made. The advertisement record could consist Of a loop 0f lm having a'single advertisement thereon which would be repeated between time announcements as shown in. Fig. 1.

When the cam spring |25 operated exactly on the ftecnth second to place the-tone on Ythe line, it also closed ground to the left hand winding of relay 215. Relay 215 operates, locks'up through its right hand Winding to ground from contacts |89 of relay-|28, and closes the 60 cycle power to the advertisement nlm driving motor L95. Motor |55 drives the advertisement nlm V|81 'past reproducer heads |85 and |89. The advertisement recorded on the iilm is picked up by the reproducer head |88, amplified by `amplifier means I 95, and'induoed over the line |92. Immediately after the advertisement,gthe control signal-is picked up by reproducerhead |59, ampliled by amplifier means |95, rectiiied by rectier means |91, and the D. C.-current output operates relay |93. Relay ISS causes the ground to k'be removed from the lower winding ofrelay 215. Relay 215 restores and opens the 60 cycle power line to 'the advertisement nlm driving motor |55. Motor |95 ceases to drive the advertisementiihn. The momentum of the nlm carries the control signal past the head |99. The advertisement is reproduced in the rst six seconds ofevery fifteen second period.

The above cycle of operation is repeated until the A480th time announcement' has been made, that being At the next tone signal the-time will be 2 oclock, andthe nlm has stopped in response to the control signal recorded on the sound track. Those-relaysnow operated at this 12 time are relays |80, 210, land 290. At this point, cam |99 will have rotated to the position where its notch 'has caused: the `closing of cam spring |20, all `other cam springs IIG'to |21 linclusive beingiopened at this point. The one hour cam III nis also rotated to the position Where it will have' caused ther-closing of cam springs |22. At exactly 2 oclo'ck, the notch on minute ycam |2 ,c'ausens'theoperation yof vcam springs |23 thereby ,closing ground through cam springs |23, |22 and |23) tothe upper winding fof relay |12. Relay |10 operates,y prepares a circuit to its lower winding from ground at the now opened contacts 21| of relay 215 through contacts I1I, closes a circuitfrom-.ground at cam springs 243 located on V.the periphery cream 234 through contacts 12 to relay/25.9, closes through contacts |13 to relays 255 and 26), and prepares a circuit to relay 258 from ground at contacts 29| of relay 295 through contacts |14. Relay 255 operates and removes the gro-und at contacts 256 from the lower winding of relay |80. Relay restores and removes the ground at contacts |83 from relay 215. Relay 210 restores and closes the ground at contacts 21| through contacts |1| tothe lower Winding of relay |10. Relay .|15 is thus held operated through its lower winding whenl the cam H2 causes the circuit to the upper winding of relay |15 to be opened at vcam springs |23. Relay 25|) operates and transfers lead 253 from one side of the power vline,- which at this time is opened at contacts 259; to the other side of the lino lat contacts 28| and lead 265 `is transferred from said other side ofthe power line to said one side at contacts 262. Leads 263 to 266 inclusive from the film driving motor 2 |2 are now connected to the power line 285 so that when `the line is closed to the lleads through contacts 259 the iilm driving motor 212 will run in a direction opposite to that rfollowed -during the period from 12 oclock to 2 oclock, the film 2-|1 being takenv off the lower reel 25| and talrcn up by the upper reel 23D.

r It will be remembered that at the sta-rt of the operation ofvthis machine the reproducer head motor 24| had caused cams 230 to 235 inclusive tor-be rotated to such a position that cam '235 had caused cam springs `242 to be opened at which time motor 24| had ceased running. Operation of relay '|10 closes the circuit from ground at cam springs 243 through contacts |12 to relay 250.

Relay 250 operates closingthe circuit from the 60 cycle power line 285 to the motor 24| through contacts 25|. Motor 24| is energized, rotating shaft 221 and thereby the cams 23|) to 235 inclusive. The cams rotate until cam 234 causes cam. springs 243 to open and remove the ground from relay 250. Relayv25| releases, opening the circuit to the motor 24| which is deenergized. Rotating with shaft 221, cam 222, by means of pins'22l to 226 inclusive, had moved the reproducer head 240 transverse to the film 2|0. The cam 234 is so positioned on the shaft 221 that when it operated cam springs 243 to stop the motor 24|, `the' reproducer head 249 had been moved to the sound track on the lm 2li) which carries the time announcements from the rst announcement At the next tone signal the time will be 2oc1ock and 15 seconds until the last time announcement At the next tone signal the time will be 4 oclock. in the second two hour period; Approximately six's'econds after 2 oclock, cam ||3 causes cam springs |24 to be closed thereby-closing the circuit from ground at contacts 29| of relayf290 through contacts 251 of recircuit from ground Y lay 255 vto the lower winding of relay 280. Relay 280 operates and closes a holding circuit from ground at contacts 291 of relay 296 through contacts 28| to its upper winding so that relay 280 will be held operated when the circuit is opened to its lower winding at cam springs |24. Relay 280 on operating closes ground at contacts 29| cf relay 290 through contacts 282 and contacts |14 to relay 258. Relay 258 operates and closes the circuit from the 60 cycle power line 285 over leads 203 to 286 inclusive to the film driving motor 2|2. Film driving motor 2|2 rotates in the direction to cause the capstan 209 to drive the film 2|0 from the lower reel 20| to the upper reel 200. The reproducer head 240 picks up the first time announcement on the sound track and the announcement is ampliiied through amplifying means |90 and induced over line |92 to be heard by any subscriber that may be on the line at the time. Immediately after the time announcement, reproducer head 2|| picks up the signal on the control sound track which is then amplified by amplifying means 211 and rectified by rectifying means 289, the D. C. output operating relay 290. Relay 296 removes the ground at contacts 291 from the upper winding of relay 280. Relay 280 restores and opens the circuit from ground at contacts 29| to relay 258. Relay 258 restores, opening a circuit from the power line to the film driving motor 2|2. Film driving motor 2|2 stops, in turn stopping thek lm 2|0. Exactly on the fifteenth second, cam ||4 closes cam springs |25 thereby closing ground to the oscillating circuit |9| for placing a tone signal on the line and also closes the upper winding of relay 215 which operates as previously described to reproduce an advertisement between the time announcements.

At approximately the sixth second of the second fifteen second period, cam ||3 closes the circuit through cam springs |24 to the lower winding of relay '280. Relay 280 operates and subsequent operations of the circuit are similar to those described previously, the time announcements being successively made after which the film driving motor stops in response to signals on the control sound track, the advertisement being made between the time announcements. This continues during the entire second two hour period, the last announcement in the second announcement sound track being At the next'tone signal the time will be 4 oclock. Shortly before 4 oclock, cam |08 will have closed cam springs ||9, all other cam springs ||6 to |2| being open at this time, and cam will have closed cam springsv |22. At exactly 4 oclock, cam ||2 closes cam springs |23 thereby closing ground at contacts 29| through cam springs |23, |22 and '||9 to the upper winding of relay |60. Relay |60 operates, preparing a circuit from ground at the now open contacts 256 of relay 255 to the lower winding of relay |60, closes ground at contacts |63 to relay 210, and prepares a circuit from ground at contacts 29| through contacts |64 to relay 25B. Relay 210 operates, opening the circuit to the lower winding of relay |19 at contacts 21|, and prepares a circuit to the lower winding of relay 280 through contacts 212. Relay |10 restores opening the circuit at contacts |13 to relays 255 and 260. Relay 255 restores, closing ground at contacts 256 to the lower winding of relay |60 to hold relay |60 operated when the circuit to its upper winding is open at cam springs |23. Relay260 restores, transferring the leads leading to the film driving motor 2|2 from one side of the 60 cycle power line to the other side so that when the circuit is closed from the 1 a direction from the upper relay 200 to the lower v relay 20|. l.'

The circuit functions in a manner similar to that described previously, the motor 24| being energized to cause cam 220 to associate the reproducer head l240 with the announcement sound track carrying the time announcements for the third two hour period and cam 233 causingl the motor v24| to be deenergized when the reproducer lhead 240 has been associated with the proper announcement sound track. The time 'announcements'in the third two hour period are reproduced inthe same manner as for the previous two. two hour periods, the film 2|0'startingunder control of the timer and stopping under control of a signal recorded in the sound track once each l5 second period, and an advertisement being reproduced between time announcements. At the end of the third two hour period the lm driving motor connections are again reversed and the reproducer head 240 associated withthe announcement sound track containing thetime announcements for thefourth two hour period.y o

The time announcements vin the fourth two hour period are reproduced after which the lm driving motor is again reversed and the reproducer head 240 associated withthe iifth announcement sound track so that the time announcements in thefifth two hour period `will be reproduced. Subsequently, the announcements in the sixth two hour period are reproduced, the last announcement being At the next tone signal the time will be twelve oclock. After this last announcement, the reproducer head 240 is again associated with the rst announcement sound track and the complete twelve hourannouncement period is repeated. Announcements will continue to be made until the machine is manually released, the release circuit not being shown. v 'v j'lhe fifteen second cam |75 is employed to keep the line |92, on which one or more telephone subscribers may be connected, clear of disagreeable clicks. Such disagreeable clicks are produced by the operation of relays and the starting andstoppingof the Various motors used in the machine, these noises being picked up and amplied by the anplier means |90 shown in Fig. 1. lThe cam ||5 is designed to open the secondary winding of transformerv |93 inthe line |92 during the short intervals of time during every fteen second period when there are relays operating or motors stopping and starting. The cam ||5 is so designed that it opens cam springs |26 during the rst one half second of every fifteen second period so that no disagreeable clicks will be heard when relays |30, |40, |50, |60, |10, |80, 250, 255, 260, etc., may be rst operated vand motor 24| rst started. After the first half second the cam ||5 will cause cam springs |26 to be closed thereby closing the secondary ywinding of transformer |93 so that the advertisement may be heard by the `telephone subscriber, During the period from about the fifth and one half second to the sixth and one half second of every fifteen second period, cam l5 opens cam springs |26 thereby opening the secondary winding of transformer |93 during the period lwhen disagreeable clicks may be caused by the operation of relays 280, 258 and the starting of film driving 15 motor 2 I`2. The: secondary winding: isagain held openby the cam yl I for about the-last one and one haltsecond of every fteen second period to Aprevent disagreeable clicks from reaching the lemployed. The roller IDU contains a groove into Which'roller` 102 will fit. Ihe lm 2|!!r is passed between the rollers '|00 and 162, the holes 900 being positioned to allow roller 102 to drop into the groove lill, thereby closing spring contacts 800. Contacts B00 close ground to relay 29B to cause the nlm driving motor to stop. The momentum of the lm will carry the hole past the roller 102 before the nlm completely stops.

It should also be understood that a film with a plurality of sound tracks thereon is not the sole means ofV carrying this invention into practice. A plurality of records may be employed, the records running simultaneously and synchronously,

all being driven by a common driving means.

For instance, a plurality of wire recordings could be'employed one being a wire having the control signals recordedv thereon and the others nbeing announcement Wires. The Wires vwould run simultaneously at the same speed past reproducers and the control signals so placed that they are picked up immediately vafter the announcements.

, Numerous uses and adaptations of this invention will occur to those versed in the art vand all changes and modications coming Within the scope of the appended claims are embraced thereby.

What is claimed is: g v

l. In an announcing system, a I'llm, a plurality of parallelspaced sound tracks running longitudinally on said nlm comprising a control sound track and a plurality of announcement sound tracks, a plurality of control signals recorded in said control sound track, a plurality of separate announcements recorded in each announcement sound track in such manner that the vannouncement sound tracks run in alternately opposite directions, reproducing means associated withthe .control sound track for reproducing the control `signals,a second reproducing means associated withone of said announcement sound tracks for reproducing the announcements recorded therein, reversible driving means for moving the nlm past said rst and second reproducer means and in the direction to reproduce the announcements in said one announcement sound track, a timer device, means operated under control of said timer device for automatically and intermittently starting said driving meansv at predetermined times, means operated in response to the reproduction-of said control signals for stopping said driving means intermittently, a second means operated under ycontrol of said timer device for moving said first vreproducing means from said one lannouncement sound track to another announcement sound track, and a third means operated under control of said timer device for re- .'versingthedrivingmeans to cause the nlm to run'in the direction opposite to that direction time.

16 fory reproducing the announcements on said one announcement sound track. v

2. Ina time announcing system, a record medium, a series of sound tracks on said record medium each having time announcements recorded thereon in accordance with time-of-day periods, a reprcducer, driving means for causing relative movement between the record medium and the reproducer, a timer device comprising a nrst series of cams each corresponding to one of said time-of -day periods, means for shifting said reproducer from one sound track to the next, said means operated under control of said series of cams, means for producing a tone signal, a second series of cams operated by said timer at shorter intervals of time, said second series of cams causing the starting of said driving means at predetermined shorter periods and the operation of said tone signal means at predetermined shorter periods.

3. In a time announcing system, a record medium having a plurality of sound tracks thereon running parallel to and not connected with each other and each having announcements recorded thereon corresponding to a period of time, a reproducer associated with said record medium for reproducing said time announcements, a motor having a series of cams, a device operated by said motor for shifting the reproducer from one sound track to the next, a timer for starting said motor at certain predetermined times ofthe day to thereby cause said device to shift the reproducer, and means controlled by said cams when the reproducer has reached the proper sound track for stopping said motor to thereby stop said reproducer on said proper sound trackl 4. In a time announcing system, a nlm, a plurality of parallel sound tracks running longitudinally on said nlm, a plurality 0; separate time announcements recorded in each sound track, each time announcement corresponding to a period of time, a reproducer associated with one sound track at a time, means for causing relative movement between the nlm and the reproducer to thereby reproduce the time announcements, a timing device for automatically operating said means in accordance with time, said timing device for automatically moving said reproducer from one sound track to another at predetermined periods of time `of greater length than said first periods of `5. In an announcing system, a nlm, a plurality of parallel spaced sound tracks extending longitudinally on said nlm comprising a control sound track and a plurality of announcement sound tracks, reproducing means associated with .one of the announcement sound tracks for reproducing the sound recorded thereon, a second reproducing means for reproducing the sound recorded on the control sound track, driving means for moving the nlm relative to the reproducing means, a timer device, means operated under control of the timer device for automatically and intermittently energizing said driving means at certain predetermined times of the day, means operated in response to spaced sounds on said'control setuid track reproduced by the second reproducing means for deenergiziiig said driving means intermittently, and a second means operated under control of said timer device for moving said nrst reproducing means transversely from said one announcement sound track to another announcement soundtrack at certain other predetermined times of the day.

6. In a time announcing system, a record device, a plurality of sound tracks on said record said shorter time-of-day periods, means for automatically deenergizing said driving means during said shorter time-of-day periods, a second means controlled by said timer device for moving said reproducer from said one sound track to another during `each said first time-of-day period, and a third means controlled by said timer device for reversing said driving means during each said iirst time-of-day period.

7. In a time announcing system, a record, a plurality of sound tracks onsaid record running in alternately opposite directions and each corresponding to a certain two hour period, a plurality of time announcements in each of said sound tracks each corresponding to a fifteen second period within a two hour period, a reproducer associated with one of said sound tracks for reproducing the time announcements. within that two hour period, reversible driving means for moving the record past the reproducer to thereby reproduce the time announcements, a timer device for indicating the time of the day, a series of cams controlled by said timer device, each cam corresponding to one of said two hour periods, means controlled by said timer device for energizing said driving means once every said fifteen second period, means for automatically deenergizing said driving means once every said iifteen second period, and means controlled by said series of cams for moving said reproducer from said one sound track to another and for reversing said driving means once every said two hour period.

8. In a time announcing system, a film, a plurality of sound tracks on said film including a control sound track and a plurality of announcement sound tracks, a plurality of control signals recorded insaid control sound track, a plurality of time announcements recorded in said announcement sound tracks in such manner that the announcement sound tracks run in alternately o-pposite directions, a reproducer associated with the control sound track, a second reproducer associated with one of said announcement sound tracks, reversible driving means for moving the 'lm past the reproducers to thereby reproduce the announcements and the control signals, a timer device comprising a synchronous motor, cam means controlled by said motor for energizing said driving means at predetermined times to cause reproduction of said time announcements and said control signals, means controlled by the reproduction of said control signals for deenergizing said driving means after each time announcement, a second cam means controlled by said motor for producing a tone signal after each time announcement, and a third cam means controlled by said motor for moving said second reproducer from said one announcement sound track to the next and for reversing the driving direction ofsaid driving means at predetermined times.

l 9. In combination with the time announcing system of claim 8, a second lm, a second control sound track on said second film, an `advertisement sound track on said second film, control signals recorded in said second control sound track, advertisements recorded in said advertisement sound track, a third reproducer associated with said second control sound track, a fourth reproducer associated with said advertisement sound track, a second driving means for causing relative movement between said third and fourth reproducers and the second film to reproduce said control -signals andsaid advertisements, means controlled by said second cam means for energizing said second driving means after each tone signal, and means controlled by the reproducing of the control signals on said second control sound track for deenergizing said second driving means.

10. In a sound reproducing system, a film, a plurality of parallel sound tracks on said film comprising a plurality of announcement sound tracks and a control sound track common to said announcement sound tracks, a plurality of control signals recorded in said control sound track, a plurality of separate announcements recorded in each announcement sound track, reproducing means associated with said i'llm for reproducing said announcements and control signals, the announcements being reproduced in succession from each sound track, the announcement sound tracks being reproduced in succession, driving means for causing relative movement between said film and said reproducing means to cause reproduction of said announcements and control signals, a timer device operated to automatically start said driving means at predetermined times, and means operated in response to the reproduction of said control signals for stopping said driving means after the reproduction of each announcement on each Iannouncement sound track.

11. In a sound reproducing system, a lm, a plurality of parallel sound tracks running longitudinally-on said nlm comprising a plurality of announcement sound tracks and a control sound track common to said announcement sound tracks, a plurality of control signals recorded in said control sound track, a plurality of separate announcements recorded in each announcement sound track in such manner that the announcement sound tracks run in alternately opposite directions, reproducing means associated with the control sound track for reproducing the control signals, a second reproducing means associated with said announcement tracks and operable to reproduce the announcement in each announcement sound track, the 'announcement tracks being reproduced in successive order, reversible driving means for causing said film to move past said reproducing means first in one direction and then in the other direction to cause said control signals to be reproduced during movement in eaohdirection and for causing the separate announcements to be reproduced from first one announcement sound track and then an adjacent announcement sound track, a timing device for automatically starting said driving means at certain predetermined times of the day to cause reproduction of an announcement in any one of said announcement sound tracks and one of said control signals, and means responsive to the reproduction of the control signal for stopping ysaid driving meansafter `said announcement has vbeen reproduced.

l2. In a sound reproducing system, a plurality of announcement record devices each having recorded thereon a differentseries of short timeof-day announcements Within a certain longer time-of-day period, reproducing means for reproducing th'e time-of-day announcements on one 4announcement record device at a time, the announcement record devices being reproduced in succession, avcontrollecord device 'common to said plurality of record devices having recorded thereon al plurality of signals, each signal associated with one 'of `said short time-of-day announcements onfeach of said announcement record devices, reproducing Vmeans for reproducing the signals on the control record device, the same signals being reproduced during the reproduction of each dierent announcement record device, driving means for causing relative movement between said record devices and said reproducing means vto cause reproduction of said announcements and said control signals, a timer ldevice for energizing said driving means once during each said short time-of-day period to cause reproduction of a time-of-day announcement on one of said record devices and the common associated control signal, and means responsive to the vreproduction of the control signal associated With the certain time-cf-day announcement reproduced for automatically deenergizing said driving means.,

13. In a timeannouncing system, a nlm, aipair of parallel sound tracks running longitudinally on said film comprising a time Aannouncement sound trackand a controlgsound track, a plurality of time announcements recorded in said announcement sound track, a plurality of control signals recorded-in said` control sound track, reproducingmeans associated vwith the fllm for reproducing thetime announcements and control signals, driving means for causing relative movement between the lm and the reproducing means, a second iilm, a pair of parallel sound tracksk on said second nlm comprising a second control sound track and a second announcement sound track, a yplurality of announcements in said second announcement sound track, a plurality of control signals recorded in said second control sound track, asecond reproducing means associated with the second film for reproducing the announcements and the control signals, a second driving means for causing relative movement between the second nlm and the second reproducing means, a timer device, means'controlled by said timer device for automatically and intermittently energizing said first driving means at predetermined times, means operated in response to the reproduction of the control signals on the first control sound track for intermittently deenergizing said rst driving means, a second means controlled by said timer device for Cir `automatically and intermittently energizing said -second driving means after the intermittent deyenergization of said irst driving means, and means operated Ain response to the reproduction of the control signals on said second control sound track for deenergizing said second driving means f 14. Ina time announcing system, means operable to reproduce a plurality of time-of-day announcements, a second. means operable to reproduce a plurality `of other announcements, a timer device operated at certain predetermined times of theday tolcause said nrst means to 'start in operation, control means automatically operated after the reproduction of each of said time announcements to stop said first means, a second timer device operated after the Astopping of said iirst means and at cert-ain predetermined ltimes of the day to cause said second means to Ystart in operation, and Ya second control means operated after the reproduction of each of said'other announcements to stop said second means.

15. In a time announcing system of the class wherein the time announcements are recorded on a record device in such a manner that the time announcement sound vtracks run in alternately opposite directions von the record device and wherein a reproducer is associated with'one sound track at a time and is shiftalole from one track to another and wherein a reversible driving means is employed to cause relative movement between the record device and lthe reproducer in either of two diirerent directions to cause reproduction of the vannouncements on any'of the sound tracks, the improvement comprising a clock device for keeping the time of the day, first means operated under control of said clock 4device for starting said driving means at certain predetermined times of the day, means for automatically stopping said driving means after a time announcement has been reproduced, a second means operated under control of said clock devicefor shifting the reproducer from one sound track to another at certain other predetermined times 'of the day, and a third means operated under control of said timer device Afor reversing said driving means at certain other predetermined times of the day.

EDWARD S. PETERSON.

REFERENCES CITED The following references are of recordin the le of this patent or the original patent:

UNITED STATES PATENTS Number Name Date 2,004,248 Miller June 11, 1935 2,252,327 Lovett Aug. V12, 17941 2,275,961 Heller 'Maz'. 10, 1942 2,344,541 Ferris 1 Mal. 21, 1944 2,444,818 Franklin July 6, 1:9'48 

